.logo_style{
    width: 82%;
    margin-left: 18%;
}

.navigation {
    width: 100%;
    height: 7vh;
    background-color: white;
    border-top: 2px solid #a40000;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    position: fixed;
    top: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-top: 10vh;
    z-index: 999;
    transform: translateY(0.1vh);
    transition: transform 0.6s;
}

.navigation_after {
    width: 100%;
    height: 7vh;
    background-color: white;
    border-top: 2px solid #a40000;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    /* justify-content: center; */
    /* align-items: center; */
    position: fixed;
    top: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-top: 10vh;
    z-index: 999;
    transform: translateY(-10vh);
    transition: transform 0.6s;
}

.index_navigation_select {
    width: 140px;
    height: 100%;
    text-align: center;
    line-height: 7vh;
    /* color: white; */
    font-size: 20px;
    background-color: transparent;
}

.index_navigation_selected {
    width: 140px;
    height: 100%;
    text-align: center;
    line-height: 7vh;
    color: white;
    font-size: 20px;
    background-color: #a40000;
}

.index_navigation_select:hover {
    background-color: #a40000 !important;
    color: white;
}

.dropbtn {
    background-color: transparent;
    text-align: center;
    line-height: 7vh;
    font-size: 20px;
    border: none;
    cursor: pointer;
    width: 140px;
    height: 100%;
}

.dropbtn_selected {
    background-color: #a40000;
    color: white;
    text-align: center;
    line-height: 7vh;
    /* padding: 16px; */
    font-size: 20px;
    border: none;
    cursor: pointer;
    width: 140px;
    height: 100%;
}

.dropdown {
    position: relative;
    display: inline-block;
}

/* 下拉内容（默认隐藏） */
.dropdown_content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

/* 下拉链接 */
.dropdown_content div {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

/* 悬停时更改下拉链接的颜色 */
.dropdown_content div:hover {
    background-color: #a40000 !important;
    color: white !important;
}

/* 悬停时显示下拉菜单 */
.dropdown:hover .dropdown_content {
    display: block;
}

/* 显示下拉内容时，更改下拉按钮的背景颜色 */
.dropdown:hover .dropbtn {
    background-color: #a40000 !important;
    color: white;
}

.submenu {
    background-color: #a40000 !important;
    color: white !important;
}